I was asked a short while ago to move a VM from an old esxhost in the existing vcenter to a new ESXi host which was a standalone server. Initially i was trying hard to figure out how i would do this task in the simplest and quickest way.We use vsphere4 standard so we dont have vMotion or svMotion and planned to go for the upgrade later on. 
Thats when the option of Quick Migration sprung up. I tried the Quick Migration and it worked very well. I didn't need vMotion or svMotion to do the job.
We were really impressed!
Just wanted to say a BIG THANKS to the Veeam team for including this extremely useful feature. We saved a lot of time, resources and money doing the Quick Migration.
Thanks a lot!

Please see the other informations on VEEAM Forums : http://forums.veeam.com/viewtopic.php?f=2&t=13573&p=62482